Answer:
The sum of PE and KE remains constant
Explanation:
Power:
P= A/t
A = F · h = m · g · h
P = m · g · h / t, m = 7.5 kg, g = 9.81 m/s², h = 8.2 m, t = 1800 s
P = 7.5 · 9.81 · 8.2 / 1800 = 0.335 W
Answer:
103.3 Kg
Explanation:
Use the following formula;
K.E = I/2 mv^2
529*2/(3.2)^2 =m
103.3 Kg=m